i can't get my engine
(Yanmar 4JH3-HTE) to start
so i went to my boat today with the new fuel
filters, bled the system all the way to the injectors and i noticed the fuel
coming out of the injectors looks weird.
so i checked the fuel in the tank and there is a serious problem in there (see pic). the bottle on the left is what i took out of the water
separator (1st stage) filter. the second stage fuel filter
looks pretty much the same. the bottle on the right is fuel directly sucked from the tank. as you can see there is a MAJOR sediment problem and it's weirdly cloudy and off color. why it's so much worse in the filter than in the tank i can't explain, i guess it's just the place in the tank where the fuel intake sucks from is worse than where i took my sample from.
anyhow, clearly the tank needs emptying, the entire fuel system flushing
and refilling. i can do that but my friend thinks it's dangerous to crank the engine
over until the fuel pump
is rebuilt, otherwise the crap that's in there now could make things worse.
what do you all think and how could the fuel get so bad? the boats in Thailand
so hot and humid all the time.